Siemens SIPART Series - 3.4.3 Mode of operation of the HART function; 3.4.4 HART system configuration

Description
3.4 Mode of operation
SIPART PS2 with and without HART
Operating Instructions, 10/2013, A5E00074631-11
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3.4.3
Mode of operation of the HART function
Note
Priority of operation / failure of power supply
•
Operation at the positioner has priority over specifications from the HART communicator.
•
Failure of the auxiliary power to the positioner also interrupts communications.
Function
The positioner is also available with built-in HART functionality. The HART protocol allows
you to communicate with your device using a HART communicator, PC, or programming
unit. You can do the following with your device:
● Convenient configuration
● Store configurations
● Call up diagnostic data
● Show online measured values
Communication takes place as frequency modulation on the existing signal lines for the
control values of 4 to 20 mA.
The positioner is integrated into the following parameter assignment tools:
● HART communicator
● PDM (Process Device Manager)
● AMS (Asset Management System)
3.4.4
HART system configuration
Overview
The positioner can be used in a number of system configurations:
● Stand-alone, supplied with the required auxiliary power supply; communication with
supplementary units (handheld), for example
● As part of a complex system environment, e.g. SIMATIC S7